Its going to be upwards of 20 degrees colder than the valley. Also more likely to have snow.... but if you enjoy that, its probably absoutely breathtakingly gorgeous.
Skyline will close based on ice and snow conditions. But the hiking and views are not diminished. You can hike in from outside the park and I do that often to see the frozen waterfalls. Dress appropriately and have correct gear for yourself and your vehicle.
No I wound not and by that time it probably will be closed anyway
Depends on how you're equipped. All wheel/4 wheel drive will be a must. And you had better take along a survival kit.
Thanks! Your answer is awaiting moderation.